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	<title>白熱電球 | ゆるおやじ研究所</title>
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	<title>白熱電球 | ゆるおやじ研究所</title>
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		<title>まだ白熱電球使ってる？LEDに変えるだけで電気代がここまで下がる</title>
		<link>https://yuruoji.com/led-denkyu-kuchigane-chigai/</link>
		
		<dc:creator><![CDATA[ゆるおじ]]></dc:creator>
		<pubDate>Mon, 30 Mar 2026 23:07:50 +0000</pubDate>
				<category><![CDATA[電気代]]></category>
		<category><![CDATA[E17]]></category>
		<category><![CDATA[E26]]></category>
		<category><![CDATA[LED電球]]></category>
		<category><![CDATA[口金サイズ]]></category>
		<category><![CDATA[白熱電球]]></category>
		<category><![CDATA[電気代節約]]></category>
		<category><![CDATA[電球交換]]></category>
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					<description><![CDATA[目次 電気代は約90％下がります点灯時間とワット数から電気代を計算する方法今ついている白熱電球のワット数を確認しましょうLEDのワット数を確認しよう電気代を計算してみよう【１日の電気代の式】LEDで電気代はどれだけ安くな [&#8230;]]]></description>
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<div class="wp-block-cocoon-blocks-balloon-ex-box-1 speech-wrap sb-id-1 sbs-stn sbp-l sbis-cb cf block-box not-nested-style cocoon-block-balloon" style="--cocoon-custom-background-color:#f3fafe"><div class="speech-person"><figure class="speech-icon"><img decoding="async" src="https://yuruoji.com/wp-content/uploads/2026/03/困っている男性-150x150.webp" alt="困っている男性" class="speech-icon-image"/></figure><div class="speech-name">困っている男性</div></div><div class="speech-balloon has-background has-watery-blue-background-color">
<p class="has-medium-font-size wp-block-paragraph">LEDって高いけど、<br>電気代は、どれだけ安くなるの？</p>
</div></div>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-2" checked><label class="toc-title" for="toc-checkbox-2">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">電気代は約90％下がります</a></li><li><a href="#toc2" tabindex="0">点灯時間とワット数から電気代を計算する方法</a><ol><li><a href="#toc3" tabindex="0">今ついている白熱電球のワット数を確認しましょう</a></li><li><a href="#toc4" tabindex="0">LEDのワット数を確認しよう</a></li><li><a href="#toc5" tabindex="0">電気代を計算してみよう</a><ol><li><a href="#toc6" tabindex="0">【１日の電気代の式】</a></li><li><a href="#toc7" tabindex="0">LEDで電気代はどれだけ安くなったか？</a></li></ol></li></ol></li><li><a href="#toc8" tabindex="0">LED電球を選ぶ時の注意点</a><ol><li><a href="#toc9" tabindex="0">全体の形</a></li><li><a href="#toc10" tabindex="0">口金サイズ</a></li><li><a href="#toc11" tabindex="0">よく使われるサイズは2種類だけ</a></li></ol></li><li><a href="#toc12" tabindex="0">LED電球の購入に必要な事の整理</a></li><li><a href="#toc13" tabindex="0">LED電球と白熱電球の違い</a></li><li><a href="#toc14" tabindex="0">まとめ</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading has-text-align-center has-ex-b-background-color has-background has-large-font-size" style="border-top-left-radius:28px;border-top-right-radius:28px;border-bottom-left-radius:28px;border-bottom-right-radius:28px"><span id="toc1">電気代は約90％下がります</span></h2>



<div class="box-summary">
  <div class="box-title">✔ この記事でわかること</div>
  <ul>
　　　<li>LEDにすると電気代はいくら安くなる？</li>
　　　<li>白熱電球とLEDの違いを簡単に解説</li>
　　　<li>失敗しない電球サイズの選び方</li>
  </ul>
</div>



<div class="trust-box">

  <div class="trust-title">👉この記事はこんな人が書いています</div>

  <div class="trust-content">
    <img src=https://yuruoji.com/wp-content/uploads/2026/03/自己pr画像.jpg alt="ゆるおじプロフィール" class="trust-icon">

    <ul class="trust-list">
      <li>電気主任技術者（三種）</li>
      <li>第一種電気工事士 / 第二種電気工事士</li>
      <li>家電の電気代を実測して検証</li>
      <li>修理・掃除・節約を実体験ベースで解説</li>
    </ul>
  </div>

</div>



<p class="wp-block-paragraph">ただし、<span class="bold">電気代は点灯時間やワット数によって違います。</span><br>又、購入時にサイズを間違える可能性があります。</p>



<p class="wp-block-paragraph">そこでこの記事では、</p>



<p class="wp-block-paragraph">・点灯時間とワット数から電気代を計算方法<br>・LED電球を選ぶ時の注意点<br>・電球サイズの簡単な測り方</p>



<p class="wp-block-paragraph">を初心者向けにわかりやすく解説します。</p>



<p class="wp-block-paragraph"><strong><span class="fz-22px"><span class="marker-under-blue"><span class="marker-under">家庭の中では、一番無理なく簡単に電気代を下げやすいです</span></span></span></strong></p>



<h2 class="wp-block-heading has-ex-c-background-color has-background" style="border-width:1px"><span id="toc2">点灯時間とワット数から電気代を計算する方法</span></h2>



<h3 class="wp-block-heading"><span id="toc3">今ついている白熱電球のワット数を確認しましょう</span></h3>



<div class="wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-7387b849 wp-block-group-is-layout-flex">
<p class="wp-block-paragraph">まずは、白熱電球を取り外します。<br>球を左に回して取り外します。<br><br>大体高い所についているので<br>転落には注意してください。</p>



<figure class="wp-block-image size-full is-resized"><img fetchpriority="high" decoding="async" width="529" height="488" src="https://yuruoji.com/wp-content/uploads/2026/03/image-38-1.jpg" alt="白熱電球の外し方 左に回して取り外す手順" class="wp-image-3152" style="width:383px;height:auto" srcset="https://yuruoji.com/wp-content/uploads/2026/03/image-38-1.jpg 529w, https://yuruoji.com/wp-content/uploads/2026/03/image-38-1-300x277.jpg 300w" sizes="(max-width: 529px) 100vw, 529px" /></figure>
</div>



<figure class="wp-block-image aligncenter size-full"><img decoding="async" width="599" height="343" src="https://yuruoji.com/wp-content/uploads/2026/03/image-38-2.jpg" alt="「白熱電球の口金とは？ネジ部分の名称と構造」" class="wp-image-3153" srcset="https://yuruoji.com/wp-content/uploads/2026/03/image-38-2.jpg 599w, https://yuruoji.com/wp-content/uploads/2026/03/image-38-2-300x172.jpg 300w, https://yuruoji.com/wp-content/uploads/2026/03/image-38-2-120x68.jpg 120w" sizes="(max-width: 599px) 100vw, 599px" /></figure>



<p class="has-text-align-center wp-block-paragraph">取り外した電球です。右側の金属ネジ部分が口金(くちがね）と呼ばれる部分です。</p>



<figure class="wp-block-image aligncenter size-full is-resized"><img decoding="async" width="583" height="578" src="https://yuruoji.com/wp-content/uploads/2026/03/image-38-4.jpg" alt="電球のワット数表示の確認方法 口金底の57Wや60W型の見方" class="wp-image-3155" style="width:457px;height:auto" srcset="https://yuruoji.com/wp-content/uploads/2026/03/image-38-4.jpg 583w, https://yuruoji.com/wp-content/uploads/2026/03/image-38-4-300x297.jpg 300w, https://yuruoji.com/wp-content/uploads/2026/03/image-38-4-150x150.jpg 150w" sizes="(max-width: 583px) 100vw, 583px" /></figure>



<p class="wp-block-paragraph">口金の底に描いています。<br>見にくいですが、<strong><span class="fz-20px"><span class="marker-under-red">57Ｗ</span></span></strong> と書いてあります。</p>



<p class="wp-block-paragraph">又、その反対には、<strong><span class="fz-20px"><span class="marker-under-blue">60W型</span></span></strong>と記載があります。<br>購入する時には、<span class="marker-under-blue">【６０W型】</span>と書いてあるLED球を買いましょう。</p>



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<h3 class="wp-block-heading"><span id="toc4">LEDのワット数を確認しよう</span></h3>



<div class="wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-7387b849 wp-block-group-is-layout-flex">
<p class="wp-block-paragraph">たいへん見難いですが、<br><strong><span class="fz-20px">6.0Ｗ</span></strong>と記載があります。<br><br>最近、老眼で見るの大変！<br><br></p>



<figure class="wp-block-image size-large is-resized"><img decoding="async" width="1024" height="980" src="https://yuruoji.com/wp-content/uploads/2026/03/IMG_3188-1024x980.jpg" alt="LED電球の消費電力の見方 本体に書かれた6.0W表示の確認方法" class="wp-image-3145" style="aspect-ratio:1.0447487093680494;width:369px;height:auto" srcset="https://yuruoji.com/wp-content/uploads/2026/03/IMG_3188-1024x980.jpg 1024w, https://yuruoji.com/wp-content/uploads/2026/03/IMG_3188-300x287.jpg 300w, https://yuruoji.com/wp-content/uploads/2026/03/IMG_3188-768x735.jpg 768w, https://yuruoji.com/wp-content/uploads/2026/03/IMG_3188-1536x1470.jpg 1536w, https://yuruoji.com/wp-content/uploads/2026/03/IMG_3188.jpg 1200w" sizes="(max-width: 1024px) 100vw, 1024px" /></figure>
</div>



<h3 class="wp-block-heading"><span id="toc5">電気代を計算してみよう</span></h3>



<h4 class="wp-block-heading"><span id="toc6">【１日の電気代の式】</span></h4>



<p class="has-text-align-center wp-block-paragraph"><span class="fz-20px"><strong><span class="marker-under-blue">〇〇 Ｗ　×　点灯時間 h × 個数 ÷ 1000 × 〇〇 円 = １日の電気代 円</span></strong></span></p>



<p class="wp-block-paragraph">※ 1000は、W を KWに換算する為<br>※ 〇〇円は、契約している電力会社によって違います<br>　👆<strong><a href="https://yuruoji.com/electricity-price-structure/">電力会社の電気代を確認する記事はこちら</a></strong></p>



<h4 class="wp-block-heading"><span id="toc7">LEDで電気代はどれだけ安くなったか？</span></h4>



<p class="wp-block-paragraph"><span class="fz-22px"><strong>【白熱電球の１日電気代】</strong></span></p>



<p class="wp-block-paragraph">５７Ｗ　×　４時間　×　1個　÷　1,000　×　22 円　＝　<strong><span class="fz-22px"><span class="marker-under-red"><span class="marker-under-blue">5 円</span></span></span></strong></p>



<p class="wp-block-paragraph"><span class="fz-22px"><strong>【LED電球の１日電気代】</strong></span></p>



<p class="wp-block-paragraph">6.0W　×　４時間　×　２個　÷　1,000　×　22円　＝<span class="marker-under"><span class="fz-22px"><strong><span class="fz-24px"><span class="marker-under-red">0.53円</span></span></strong></span></span></p>



<p class="wp-block-paragraph">なんと！　その差 <strong><span class="fz-24px"><span class="marker-under-red">4.47円</span></span></strong></p>



<p class="wp-block-paragraph"><span class="fz-22px"><strong>【１年間の電気代削減量】</strong></span></p>



<p class="wp-block-paragraph">8.9円　×　３６５日　＝　<strong><span class="fz-22px"><span class="marker-red">1,631 円</span></span></strong><br></p>



<p class="wp-block-paragraph">※個人的に計算される方は、点灯時間・電気単価〇〇円をご自分で変えて<br>　計算してみてください。<br>👉<a href="https://yuruoji.com/electricity-price-structure/">各電力会社の電気単価を知りたい方は、こちら</a>（電力会社リンクあり）</p>



<h2 class="wp-block-heading has-ex-c-background-color has-background"><span id="toc8">LED電球を選ぶ時の注意点</span></h2>



<h3 class="wp-block-heading"><span id="toc9">全体の形</span></h3>



<figure class="wp-block-image aligncenter size-large is-resized"><img decoding="async" width="1024" height="497" src="https://yuruoji.com/wp-content/uploads/2026/03/image-38-3-1024x497.jpg" alt="白熱電球の形状とサイズの確認方法 LED交換前のチェック" class="wp-image-3154" style="width:470px;height:auto" srcset="https://yuruoji.com/wp-content/uploads/2026/03/image-38-3-1024x497.jpg 1024w, https://yuruoji.com/wp-content/uploads/2026/03/image-38-3-300x146.jpg 300w, https://yuruoji.com/wp-content/uploads/2026/03/image-38-3-768x373.jpg 768w, https://yuruoji.com/wp-content/uploads/2026/03/image-38-3.jpg 1114w" sizes="(max-width: 1024px) 100vw, 1024px" /></figure>



<p class="wp-block-paragraph">まずは全体の形と、大体のサイズを測定しておく事が必要です。<br>色々な形の球があるので、物によっては、器具に装着できない場合があります。</p>



<h3 class="wp-block-heading"><span id="toc10">口金サイズ</span></h3>



<p class="wp-block-paragraph">口金の直径を測定します。<br>LED電球を購入するにあたり、一番重要な項目となります。</p>



<div class="wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-7387b849 wp-block-group-is-layout-flex">
<p class="wp-block-paragraph"><span class="fz-22px"><strong>【失敗例】</strong></span><br>定規で直径を測定しましたが、<br>15mmにしか見えません</p>



<figure class="wp-block-image size-full"><img decoding="async" width="311" height="287" src="https://yuruoji.com/wp-content/uploads/2026/03/image-38.png" alt="電球の口金サイズの測り方 失敗例（定規では正確に測れない）" class="wp-image-3156" srcset="https://yuruoji.com/wp-content/uploads/2026/03/image-38.png 311w, https://yuruoji.com/wp-content/uploads/2026/03/image-38-300x277.png 300w" sizes="(max-width: 311px) 100vw, 311px" /></figure>
</div>



<div class="wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-7387b849 wp-block-group-is-layout-flex">
<p class="wp-block-paragraph"><span class="fz-22px"><strong>【成功例】</strong></span><br>台の上に乗せて、<br>直径を測定します。<br><strong><span class="fz-22px"><span class="marker-under-blue">17ｍｍ</span></span></strong>である事が<br>分かりました</p>



<figure class="wp-block-image size-full"><img decoding="async" width="338" height="261" src="https://yuruoji.com/wp-content/uploads/2026/03/image-40.png" alt="電球の口金サイズの正しい測り方 台に置いて直径を測定する方法" class="wp-image-3158" srcset="https://yuruoji.com/wp-content/uploads/2026/03/image-40.png 338w, https://yuruoji.com/wp-content/uploads/2026/03/image-40-300x232.png 300w" sizes="(max-width: 338px) 100vw, 338px" /></figure>
</div>



<h3 class="wp-block-heading"><span id="toc11">よく使われるサイズは2種類だけ</span></h3>



<p class="wp-block-paragraph">家庭でよく使用されている電球の口金サイズ</p>



<ul class="wp-block-list">
<li>１７ｍｍ　→　E17</li>



<li>２６ｍｍ　→　E26　</li>
</ul>



<hr class="wp-block-separator has-alpha-channel-opacity"/>



<h2 class="wp-block-heading has-ex-c-background-color has-background"><span id="toc12">LED電球の購入に必要な事の整理</span></h2>



<ul style="margin-top:var(--wp--preset--spacing--20);margin-right:0;margin-bottom:var(--wp--preset--spacing--20);margin-left:0" class="wp-block-list">
<li>〇〇Ｗ型</li>



<li>今までついていた電球の大きさと形</li>



<li>口金のサイズ（E17 or E26)</li>
</ul>



<p class="wp-block-paragraph"><br>以上の３点を確認して、購入しましょう。</p>



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<h2 class="wp-block-heading has-ex-c-background-color has-background"><span id="toc13">LED電球と白熱電球の違い</span></h2>



<p class="wp-block-paragraph"><strong><span class="fz-22px">【LED電球の特徴】</span></strong></p>



<ul class="wp-block-list">
<li>購入費用が、白熱電球より高い（ワット数にもよるが　<strong><span class="marker-under">1000～1800円</span></strong>）</li>



<li>総点灯時間が長い　(<strong><span class="marker-under"><span class="marker-under-blue">40,000時間</span></span></strong>と言われています）</li>
</ul>



<p class="wp-block-paragraph"><span class="fz-22px"><strong>【白熱電球の特徴】</strong></span></p>



<ul class="wp-block-list">
<li>購入費が、LED電球よりも高い（ワット数にもよるが　<strong><span class="marker-under-red"><span class="marker-under">200～300円</span></span></strong>）</li>



<li>総点灯時間が短い（大体、<strong><span class="marker-under-blue">1,000～2,000時間</span></strong>程度）</li>
</ul>



<hr class="wp-block-separator has-alpha-channel-opacity"/>



<p class="wp-block-paragraph">毎日の点灯時間や使用回数によりますが、<br><strong><span class="fz-22px"><span class="marker-under-red">高いLED電球を購入しても、大体１年～２年ぐらいで<br>購入費を稼いでくれ</span></span><span class="marker-under-red"><span class="fz-22px">ます</span></span></strong></p>



<h2 class="wp-block-heading has-ex-c-background-color has-background"><span id="toc14">まとめ</span></h2>



<p class="wp-block-paragraph">LED電球への交換はとても簡単ですが、<br><strong>口金サイズと外形は必ず確認してください。</strong><br><span class="marker-red"><strong>（本当によく間違えます）</strong></span></p>



<p class="wp-block-paragraph">ここを間違えなければ、<br>誰でも安全に電気代を節約できます。</p>



<hr class="wp-block-separator has-alpha-channel-opacity"/>



<p class="wp-block-paragraph"><a href="/rice-cooker-electricity-cost-measurement/">炊飯器の電気代（炊飯）</a><br><a href="/suihanki-keep-warm-power/">炊飯器の電気代（保温）</a><br><a href="/dryer-electricity-cost-measured/">ドライヤーの電気代</a></p>



<p class="wp-block-paragraph">👉 実測した家電の電気代ランキングはこちら<br><a href="/one-time-electricity-cost-ranking/">1回あたりの電気代ランキング</a><br><a href="/hourly-electricity-cost-ranking/">1時間あたりの電気代ランキング</a></p>



<p class="wp-block-paragraph">👉 他の家電はどれくらい？一覧で見る<br><a href="/electricity-cost-measurement/">電気代まとめ記事</a></p>



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